Great day for streams!
Marc Jacobs is in HD, apparently you need to RSVP via marcjacobs.com to watching it on live.marcjacobs.com - I say 'apparently' because it doesn't seem that once you RSVP you need to do anything - no username/password or special link, it just says 'Thanks for subscribing' so obviously it's just to get you on their mailing list and nothing else. You can also view it on their Facebook page.